(Peltor Ear Muffs)
The picture on the left shows the sharp edge of the muffs that can seriously scratch
your rifle stock. The picture on the right shows the improved rounded edge.
You can use a scraper or a file to reshape the lower part of your ear muffs by
rounding off sharp edges. This is a pair of Peltor Pro-7 muffs, and I've never experienced this stock scratching problem when shooting any other rifle.
However, every rifle has a different shape, and if you're not careful, it is very easy to end up with some surprising stock scratches after a long day at the range.